Introduction / Summary (2018): Hello and welcome to our
Sexuality pages. While this is not a pornographic site, it is provocative - founded upon
what people search on the Internet (which is very interesting!). We then
relate this to our biological and cultural evolution.
Sex is obviously important to people - and if you want to improve your sexual
relationships then knowing the truth about our human evolution is the best
foundation. By opening our minds to a greater diversity of behaviors, this
knowledge will help you creatively cultivate healthy pleasurable moral
attitudes and sexy smutty relationships (free from religious
guilt & cultural myths).
Support an open honest discussion on the truth of our sexual evolution and behaviour. If you support sex positive,
moral, informed sexual behaviour please share this knowledge. (These pages
have a diverse collection of fascinating information relating to our human
sexual evolution so people will appreciate it - see our 'nice letters' page!).
Sincerely, Karene.

"It is not enough to conquer; one must learn to seduce." (Voltaire) - "Desire is the essence of a man." (Spinoza)

Hello. Thanks for visiting our evolutionary philosophy of human sexuality
pages. We are currently researching good quality sites relating to our biological
and cultural sexual evolution - as a way of collecting and presenting the
most important / latest knowledge and research.

Below you will find summaries of articles & websites on Male
Penis Size, i.e. latest research on evolution, health and male
sexuality, dominance, anatomy & function of the penis, average size
& statistics, boy to adult development, flaccid vs erection, sexual
arousal, intercourse, orgasm, cultural myths of masculinity (am I too small?),
pornography & 'big' men, pictures.
Compared with other search terms, 'penis' gets a high number of searches
(35,000 /day, rank top 50). It is interesting to consider the top related
searches for penis are all related to size. Studies have shown that it is
males who are most affected by the image / size of a penis. i.e. Some speculate
that penis size is less to do with satisfying a woman, and more to do with
sexual selection relating to dominant males. This is also consistent with
the fact that as we evolved to walk on two legs, our genitals became more
exposed, thus providing a more obvious evolutionary mechanism (evolving
a larger penis) as a sign of male dominance.

We hope you find the following articles & websites interesting, informative
and useful.
Karene

Male Physiology - Normal Penis & Testicle Size

From the website: 'Wessells and colleagues have reviewed the normative
data on penis size of the adult human male. In these studies sample size
ranged from 50 to 2,770 subjects with an age range between 17 and 91 yr.
The average unstretched flaccid length ranges from 8.85 cm to 10.7 cm, stretched
flaccid length ranges from 12.45 cm to 16.74 cm, and erection length ranges
from 12.89 cm to 15.5 cm.

Reports on penile volume are limited and have relied either upon the measurement
of penile circumference manually or penile cross-section by ultrasound techniques.
The increase in central obesity may contribute to occasionally reported
decrease in penile length with age. There is a loss of tensile strength
of the tunica as men grow older, but no loss of the tunica albuginea itself.

Normally, the testis increases in size from 1–3 cm during the neonatal
period of life to 15–30 cm in adulthood. A normal size adult testis
has dimensions of 4.1–5.2 cm in length and 2.5–3.3 cm in width.
Based on the available data, Wessells and colleagues considered adult men
with penile length of greater than 4 cm in the unstretched flaccid state
or greater than 7.5 cm in the stretched flaccid state or the erect state
to have a normal penile length.

https://edrv.endojournals.org/cgi/content/full/22/3/342#SEC2

Male Sexuality - Arousal, Penis Size, Erections & Orgasm

An essay on male sexuality which describes the causes and signs of sexual
arousal (complex interaction of physical and psychological processes) followed
by information on erections and male orgasm / ejaculation.

A very interesting essay from the journal of Evolutionary Psychology
on sperm competition and its role in shaping the human penis, (size, length,
width, forceful ejaculation), evolutionary strategies for successful fertilization
i.e. semen displacement and coagulation. On sexual intercourse and evolutionary
benefits of deep penis thrusting, function of the foreskin and effects of
circumcision, premature ejaculation, female reproductive strategies i.e.
copulation with multiple partners, human sexual behaviour and wife rape
(males having sex with their partner if suspecting them of infidelity).

... The typical erect human penis ranges from 127mm to 178mm in length
(Masters & Johnson, 1966), with an average circumference of 24.5mm (Wessells,
Lue, and McAninch, 1996). In contrast with our closest living relative,
the human penis is roughly twice as long and wide as that of the common
chimpanzee (Short, 1980). A longer penis would not only have been an advantage
for leaving semen in a less accessible part of the vagina, but by filling
and expanding the vagina it also would aid and abet the displacement of
semen left by other males as a means of maximizing the likelihood of paternity.

Cultural Myths About Male Sexuality

The myths regarding male sexuality have been particularly tenacious because
men have traditionally not talked about their sexual feelings and experiences
honestly and openly with each other.
Myths debunked include penis size, that men are always willing and want
sex, very few men are virgins, sex requires an erection, sex is over when
a man comes, all orgasms are earth shattering, men in relationships don't
masturbate.

Sexual Physics (Humor)
Small Penis Size and Quantum Physics

Question: My boyfriend, Peter, has a very small penis. In fact, it is so
small that I can’t actually see it, although he assures me that it
exists and informs me when it is erect. Recently, through my study of physics,
I have learnt that the laws of quantum mechanics become apparent at the
level of the very small, and was wondering what implications this might
have on our sex life?
Mary

Answer: The area of physics that applies to the very small is called quantum
theory. Suppose we take your boyfriend’s word for it that his penis
actually does exist, then quantum theory says that in addition to having
a material existence, his penis also has a wave function that measures its
probability of existing in every state at every point in space and time.
When an observation is made, his penis exists in one of these states and
locations; but before observation, his penis exists in a neither state described
by the sum of all possible states. If you don’t understand this, then
don’t worry because if you think you understand it, then you have
probably misunderstood. Einstein despised this interpretation of quantum
theory because of his belief that God does not play dice with penises. Schrodinger
despised it because he thought it was absurd to think of a pussy that could
be both dead and alive at the same time. It is probably safe to say that
nobody properly understands quantum physics; it just conforms to all the
observations.

An explicit example of this is the double slit experiment. In this experiment,
a beam of electrons is shot through two slits and a photographic film placed
behind the slits records the resulting pattern. If the electron were simply
a material particle obeying the laws of classical mechanics, then we would
expect to see two tiny lines burned into the photographic film behind each
slit. However, what we actually see is an interference pattern corresponding
to the interference of two waves. When electrons are shot one at a time,
we see the same pattern. The explanation of quantum physics, and the only
explanation consistent with these observations, is that the probability
distribution of the each electron spreads out over space, allowing a single
electron to penetrate both slits simultaneously and proceed to interfere
with itself behind the slits.

Your boyfriend’s penis is not that different from an electron. If
it is small enough, then its wave function will also spread out over a space
large enough for it to penetrate more than one slit simultaneously. In fact,
the smaller the penis, the more slits it will be able to penetrate at once.
If you were to line up a number of ladies on a bed, your boyfriend would
be able to thrust into all of them at once. To be optimistic about his penile
inadequacy, what he will lose in quality of stimulation, he will gain in
quantity.

So you may wonder, if your boyfriend were to ejaculate while his penis-wave-function
is penetrating multiple slits simultaneously, how many ladies could he potentially
fertilise? Could the wave function of his spermatozoa fertilise every lady
whose slit he is penetrating, so that he could fertilise multiple women
simultaneously? Well, according to quantum theory, although the wave function
of his penis can spread out over space to penetrate multiple slits at once,
his penis is still a material object that goes through one slit or the other,
as are also his spermatozoa. And so with every entry involving an ejaculation,
he will at best only fertilise one lady. The best he can do to get around
this restriction is to ejaculate over many consecutive entries, because
if his penis randomly goes into a different slit with each entry, then he
could conceivably fertilise a different lady with each ejaculation.

But will these ladies want to mother his child? After all, penis size is
largely genetic, and in the event that their child is a boy, they will probably
want him to be more generously endowed than your boyfriend. A form of contraception
is therefore advisable, but a simple condom will be ineffective. At such
small sizes, quantum theory predicts that the spermatozoa will simply tunnel
through the condom. If a spermatozoon is ejected from a very-small-penis,
then it logically follows that the actual spermatozoon must be even smaller
than the already-very-small-penis. Since the consequences of quantum mechanics
become noticeable at the level of the very small, then each spermatozoon
will have a probability distribution that will actually smear through the
condom. And given the huge sample size of spermatozoa ejected in even a
modest ejaculation, it is a near certainty that one of these will tunnel
through the condom to cause fertilisation.

This fact confers a dangerous selective advantage to men-with-very-small-penises
because these men can pass their genes on to the next generation more efficiently
by deceptively fertilising ladies under the illusion that they are being
protected against fertilisation by using a condom. This enhanced reproductive
efficiency is multiplied by the ability of men-with-very-small-penises to
fertilise multiple ladies every time they indulge in sexual intercourse.
From one perspective, the development of a very small penis could be considered
the next step in male hominid evolution.

The only contraceptive protecting humanity against the prominence of males-with-very-small-penises
is the quantum prediction that before a very-small-penis is observed, then
there is a probability that it doesn't really exist. This probability is
probably quite high because a subatomic particle, atom or molecule probably
can't urinate or copulate on its own. If it could, then we would all be
covered in microscopic penises. Before you agree to participate in any of
the sexual implications opened up by very-small-penises, check your boyfriend
out under the electron microscope. As a general rule, it doesn't exist until
you observe it.

https://johnmm.bol.ucla.edu/sexualphysics/verysmall.htm

Analyse
any human emotion, no matter how far it may be removed from the sphere of
sex, and you are sure to discover somewhere the primal impulse, to which
life owes its perpetuation. ... The primitive stages can always be re-established;
the primitive mind is, in the fullest meaning of the word, imperishable.
... Mans most disagreeable habits and idiosyncrasies, his deceit, his cowardice,
his lack of reverence, are engendered by his incomplete adjustment to a
complicated civilisation. It is the result of the conflict between our instincts
and our culture. (Sigmund Freud)

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